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Finding the Fourth Proportional to 522.55, 784.41 and 279.01

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Solution

The fourth proportional to 522.55, 784.41 and 279.01 is: 418.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.55 : 784.41 = 279.01 : x
  2. Step 2: Convert to fraction form
    522.55/784.41 = 279.01/x
  3. Step 3: Cross multiply
    522.55x = 784.41 × 279.01
  4. Step 4: Simplify right side
    522.55x = 218,858.23
  5. Step 5: Solve for x
    x = 218,858.23/522.55
  6. Step 6: Final answer
    x = 418.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.